isInjective f
Checks if vertices map to unique vertices.
The inclusion of a face is injective.
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The identity map should always be injective.
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Collapsing a triangle to an edge should not be injective.
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The source of this document is in /build/reproducible-path/macaulay2-1.25.06+ds/M2/Macaulay2/packages/SimplicialComplexes/Documentation.m2:4225:0.